Grower Glossary – CUpdated 18 days ago

C stands for canopy, calcium, and control. Three things that decide whether your grow works. Below are every cultivation term starting with the letter C, blending grower slang with the science so you can actually use it.

Calcium (Ca)

A vital secondary nutrient that strengthens cell walls, supports enzyme activity, and regulates nutrient movement inside the plant. Real calcium deficiency shows as weak stems, curled or hooked new growth, brown edges on new leaves, and in fruiting plants, blossom end rot.

Grower slang: "Cal-def."

Cronk tip: Use CalMag 2-0-0 for Classic or Autoflower lines, or PuurCalMag for PuurOrganics grows. Most "calcium deficiencies" growers diagnose are actually pH lockout below 6.0. Check runoff pH before adding more CalMag.

CalMag

Short for calcium and magnesium supplement. Prevents the most common deficiencies in coco, hydro, and RO or filtered water grows. Cronk CalMag has an NPK of 2-0-0 with trace iron.

Grower slang: "Running CalMag."

Cronk tip: In the Cronk mixing order, CalMag goes second, right after Armadillo Armour (silica). If you're not using Armadillo Armour, CalMag goes first. Never add CalMag before silica because silica polymerizes in mineral salt solutions and becomes unavailable to the plant.

Calyx

The small teardrop-shaped structure that forms part of a cannabis bud, holding pistils and resin glands.

Grower slang: "Calyx swell" refers to late-flower bud expansion when the calyxes plump up.

Canopy

The top layer of your plant growth, where light meets leaves. A flat, even canopy gives uniform light distribution and bigger yields.

Grower slang: "Dial in your canopy," "canopy's tight," or "canopy management."

Techniques like LST, topping, and SCROG help shape and optimize the canopy.

Canopy Penetration

How deeply light reaches into the plant canopy before getting blocked by upper leaves.

Grower slang: "Light punch" or "deep penetration."

Adjusting light height and defoliating inner growth increases yield on lower bud sites.

Cannabis

A flowering plant genus grown for its resinous buds containing cannabinoids (THC, CBD, and others). Cannabis is a short-day annual, meaning photoperiod varieties flower when light cycles shorten.

Grower slang: "The plant," "trees," "girls," "the crop."

Cronk Nutrients are formulated for cannabis nutrition but work just as well on fruits, herbs, and vegetables.

Cannabinoids

Chemical compounds produced by cannabis that interact with the human endocannabinoid system. The two most well-known are THC (psychoactive) and CBD (non-psychoactive), but over 100 minor cannabinoids exist.

Grower slang: "Canna compounds," "actives," or "cannabinoid profile."

Lighting, nutrient ratios, and stress levels all influence cannabinoid concentration during flower.

Capillary Action

The upward movement of water and nutrients through plant tissue and growing media via small pores.

Grower slang: "Wicking."

Used in wick hydroponics, bottom-feeding systems, and passive planters.

Carbohydrates

Sugars like glucose that power plant metabolism and feed microbial life in the root zone.

Grower slang: "Plant carbs" or "sugar feed."

Cronk tip: Add Sticky Bandit during bloom. It fuels beneficial microbes and supports flavor, aroma, and resin production.

Carbon Dioxide (CO₂)

A key ingredient in photosynthesis. Plants absorb CO₂ and light to produce sugars.

Grower slang: "CO₂ tanks," "boosting CO₂," or "CO₂ burner."

Supplementing CO₂ to 1200 to 1500 ppm can increase growth rates and yields, but only if your light intensity, temperature, and humidity are dialed in first. CO₂ without matching light and heat is wasted money.

Carbon Filter

A filter packed with activated carbon that removes odors from grow room exhaust air.

Grower slang: "Carbon scrubber" or "odor control."

Cronk tip: Replace filters every 12 to 18 months for best performance. High-humidity environments shorten filter life.

Carbon Scrubber

Another name for a carbon filter. A ventilation device containing activated carbon that eliminates odor from grow room exhaust.

Grower slang: "Scrubber" or "carbon can."

Carotenoids

Pigments that assist photosynthesis and protect chlorophyll from light stress. They're responsible for the red, yellow, and orange tones you see in late flower or during senescence.

Cation Exchange Capacity (CEC)

A soil property that measures how well a medium holds nutrients (cations like Ca²⁺, Mg²⁺, K⁺).

Grower slang: "Buffering power."

Coco coir has very high CEC and actively binds calcium and magnesium, which is why coco growers have to run CalMag continuously. Soil has moderate CEC and buffers better, so it's more forgiving.

CBC (Cannabichromene)

A minor cannabinoid believed to enhance other cannabinoids through the entourage effect.

Grower slang: "Minor canna" or "support compound."

CBC formation is mostly genetic but can be optimized through stable, low-stress flowering conditions.

CBD (Cannabidiol)

A non-psychoactive cannabinoid known for its calming and therapeutic properties. Found in both hemp and certain cannabis cultivars.

Grower slang: "CBD strain" or "high-CBD run."

Higher CBD content comes from genetics bred for expression plus stable flower development under optimal light and nutrient balance.

CBG (Cannabigerol)

Known as the "mother cannabinoid" because it's the precursor to both THC and CBD during plant biosynthesis.

Grower slang: "CBG base" or "early cannabinoid."

CBG levels are usually low at harvest unless specifically bred for. Harvesting earlier in bloom can slightly increase CBG content.

CBN (Cannabinol)

A mildly psychoactive cannabinoid formed when THC oxidizes over time (aging, or exposure to light and air).

Grower slang: "Sleepy cannabinoid" or "aged THC."

Higher CBN levels occur in old or overcured buds and are associated with sedative effects.

Cellulose

The main structural material in plant cell walls. Provides rigidity and strength, which is what lets stems support heavy buds.

Grower slang: "Stem strength."

Chelation

The process of binding nutrients (like iron, zinc, manganese) with organic compounds to keep them soluble and available to roots.

Grower slang: "Chelated micros."

Cronk tip: Micro in the Classic Line contains fully chelated micronutrients for consistent uptake across a wide pH range.

Chlorophyll

The green pigment that captures light energy for photosynthesis.

Grower slang: "Chloro fade" when leaves pale or yellow.

Yellowing during late flower is natural. It means the plant is finishing and drawing down stored nutrients into the buds.

Chloroplast

The plant cell organelle that contains chlorophyll and conducts photosynthesis.

Grower slang: "Green engines."

Chlorosis

Leaf yellowing caused by a loss of chlorophyll, usually from nutrient deficiency, pH lockout, or root zone problems. The pattern tells you which nutrient is short:

• Uniform yellowing on older leaves points to nitrogen or magnesium (both mobile nutrients the plant moves around)
• Yellowing on new growth with green veins points to iron
• Interveinal chlorosis (yellow tissue between green veins) on older leaves specifically points to magnesium

Grower slang: "Fade" or "hungry fade."

Cronk tip: Before adding more nutrients, check runoff pH. Most chlorosis calls are actually pH lockout, not a missing nutrient.

Clone

A cutting from a healthy mother plant that develops roots to create a genetically identical plant. Guarantees genetic consistency and faster first-month growth compared to seed.

Grower slang: "Cut," "clone cut," or "taking cuts."

Cronk tip: Use clean scissors, rooting gel, and gentle light. Keep humidity high until roots show through the plug.

Clone Dome / Prop Dome

A clear humidity cover used to retain moisture during cloning or germination.

Grower slang: "Dome life."

Pro tip: Remove daily for air exchange to prevent mold and fungal issues.

Clone Mother (Mother Plant)

A mature, healthy plant kept in perpetual veg to provide clone cuttings over many months or years.

Grower slang: "Mum" or "mother stock."

Feed lightly and prune regularly to maintain strong genetics and prevent the mother from outgrowing its space.

Clone War

Grower slang for competition among growers or strains to see who produces the best clones or results. Popular in cannabis communities, usually good-natured.

Closed-Loop System

A grow setup designed to recycle water, air, and nutrients with minimal waste. Common in sealed hydroponic or CO₂-enriched environments.

Grower slang: "Sealed room."

Clyde

The bloom-phase nutrient in Cronk's Bonnie and Clyde Autoflower Line, with an NPK of 3-6-5.

Grower slang: "Feeding Clyde."

Clyde is used only in the flower stage of autoflower grows. Never mix Clyde with Bonnie in the same feeding. You switch from Bonnie to Clyde when your plant transitions from veg to flower, usually around week 4 or 5. Use with CalMag throughout and optionally Bud Booster for denser buds.

COB (Chip on Board)

A type of LED grow light that produces a strong, broad light spectrum from a single compact source.

Grower slang: "COBs." Known for efficiency and deep canopy penetration.

CO₂ Controller

An electronic system that monitors and regulates carbon dioxide levels in sealed grows.

Grower slang: "CO₂ brain."

Coco Coir

A renewable grow medium made from coconut husk fibers. Excellent aeration and water retention make it ideal for hydro-style grows. Coco has high cation exchange capacity, which means it actively binds calcium and magnesium, so growers in coco must supplement CalMag continuously to keep those minerals available.

Coco also has a hard pH cap at 6.5. Above 6.5, iron and phosphorus lock out quickly.

Grower slang: "Coco runs," "buffered coco."

Cronk tip: Pre-buffer coco with CalMag before first use, then run CalMag in every feed. Target pH 5.8 to 6.2, and never let it drift above 6.5.

Cola

A main flowering cluster or bud site on a cannabis plant.

Grower slang: "Top cola," "main," or "stack."

More colas equals more yield, which is why techniques like topping, SCROG, and LST are used to create more cola sites per plant.

Colchicine (Advanced Term)

A chemical used in plant breeding to double chromosome count, creating polyploid strains with unique characteristics. Used in advanced cannabis genetics work. Not relevant for production growers.

Cold Stress

A physiological stress caused by low temperatures below about 20°C (68°F). Leads to purpling stems, slowed growth, and nutrient uptake issues.

Grower slang: "Cold snap" or "purple shock."

Keep the root zone warm and avoid watering with cold solutions straight from an unheated reservoir.

Compost

Decomposed organic matter rich in nutrients and beneficial microbes.

Grower slang: "Black gold."

Even if you're running Cronk liquid nutrients, adding compost to soil improves structure and microbial life.

Compost Tea

A liquid brewed from compost and beneficial microbes. Used to inoculate soil with live biology and improve root zone health.

Grower slang: "Microbe tea" or "brew."

Cronk tip: Aerate for 24 hours with an air stone. Avoid anaerobic brews, they smell sour and they'll hurt the plants you're trying to help.

Conductivity

The ability of a nutrient solution to conduct electricity, measured as EC. Indicates overall feed strength, though not the specific ratio of nutrients.

Grower slang: "Hot mix" (high EC) or "weak feed" (low EC).

Contamination (Cross-Contamination)

When harmful microbes or pathogens spread between plants, tools, or systems.

Grower slang: "Crossed," "dirty tools," or "sick cut."

Sanitize tools between plants to prevent diseases like powdery mildew, root rot, or hop latent viroid.

Cotyledon

The seed's first leaves (usually rounded) that store energy for initial growth.

Grower slang: "Seed leaves."

They yellow and fall off naturally as true leaves take over. Don't panic when it happens.

Crop Steering

A precision cultivation technique that uses environmental and irrigation changes to steer growth toward either vegetative (stretch) or generative (bud building) modes.

Grower slang: "Steering the crop."

Used heavily in professional cannabis facilities to maximize yield and resin content.

Crossbreeding

Pollinating two plants with different traits to combine genetics and create new cultivars.

Grower slang: "Cross," "hybrid," or "breeding project."

This is how new cannabis strains get created. Gelato crossed with Zkittlez gave us Runtz.

Crown

The base of the stem where it meets the root system. Keeping the crown dry prevents damping-off and stem rot.

Grower slang: "Stem base."

Curing

The controlled aging of dried cannabis buds to enhance aroma, smoothness, and potency. Stored around 60% humidity in airtight containers.

Grower slang: "Jarred up," "in cure," or "burping jars."

Cronk tip: Open jars daily for the first week to let moisture escape. This is the single biggest factor in how smooth the final flower will be.

Cuticle

The waxy outer layer on leaves that prevents water loss and protects against pests and foliar disease.

Grower slang: "Leaf skin."

Cytokinins

Plant hormones that stimulate cell division and new shoot growth. Work in balance with auxins to determine plant shape and bud development.

Grower slang: "Growth juice."

Still need help?

From coco coir to crop steering, getting the C-words right helps you take control of your environment, nutrition, and canopy. If you can't find the term you're looking for, email us at [email protected]. We reply within 24 hours.